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Continuing with P:

These are not used:

• passive leap
• passive piece (its few uses are not with the glossary definition)
• passive square is used by Charles Gilman in Stock Goes East 49 files, Man and Beast 21, and Fiancé Chess.
• range capture. The more common term is rifle capture.
• rearward diagonals

These are rarely used:

• passive move is used in Tiger Lily Chess and Xiangqi.
• pocket piece appears only in two articles on fairy chess problems.
• points is normally used with other definitions. It is used once on Xiangqi, which just points out that intersections are called points. That could be removed. Point is an uncommon word for intersection.
• radial move appears mainly in some piece articles and a couple games by Charles Gilman and in my Alibaba article.
• radial square appears in Gilman's Mixed Radial Hex Chess, but only to describe another of his games.
• range piece appears mainly in phrases like short-range piece, long-range piece, and mid-range piece, which have nothing to do with the definition given. The definition is for pieces that capture from a distance, such as those in Rifle Chess, but that game's page does not use the term.
• reserved piece is used only in Summoner's Chess.

These seem redundant or unnecessary

• promotable. It's enough to have promote.
• properties is a common English word, and the definition just says see move options.

It's time to take a break again. I'm in the Rs.